Full
Outline
A gently inclined and multi-layer poor ore vein contains lead-zinc, magnetite and sulfur-copper minerals at the same time. Based on the characteristics of the ore body and its low grade, a pseudo inclined strip roadway filling mining method was proposed for safer and more economical mining. FLAC3D software was used to simulate and analyze the roof displacement, pillar stress, and plastic zone distribution under different approach widths. Research results show that the pseudo inclined strip roadway filling mining method can effectively reduce the loss and impoverishment of ore, greatly reduce mining and cutting engineering amount, increase the production capacity of the stope, and achieve separate mining and transportation of different types of minerals. It can be flexibly applied to complex and variable gently inclined ore bodies. After numerical simulation analysis, the optimal approach width for this mine is determined as 5 m or 6 m.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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